Fast CMOS bus receiver for detecting low voltage swings

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(11)

EP 0 484 009 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	11.05.1994 Bulletin 1994/19

(43)	Date of publication A2:
	06.05.1992 Bulletin 1992/19

(21)	Application number: 91309584.0

(22)	Date of filing: 17.10.1991

(51)	International Patent Classification (IPC)⁵: G06F 13/40, H03K 3/356

(84)	Designated Contracting States:
	DE FR GB NL

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Priority:

01.11.1990 US 607979

(71)	Applicant: Hewlett-Packard Company
	Palo Alto, California 94304 (US)

(72)	Inventors:
	Jaffe, William S. Fort Collins, CO 80525 (US) Ranson, Cheryl A. Fort Collins, CO 80525 (US)

(74)	Representative: Colgan, Stephen James et al
	CARPMAELS & RANSFORD 43 Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)

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References cited: :

(54)	Fast CMOS bus receiver for detecting low voltage swings

(57) A bus receiver (10) includes a differential input amplifier circuit (18, 18'), a pair of source followers (16, 16'), and a sense amp (12) having sense and latch modes. In a preferred embodiment of the invention, the bus receiver (10) is implemented as a CMOS large scale integrated circuit comprising a plurality of FETs (20-34, 20'-34'), and is capable of detecting +/- 0.2 volt transition of a data signal (SIG IN) relative to a reference voltage (VREF) for data signals having setup times as low as about 1 nanosecond.

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